A friend of --is waiting for them(they)

A friend of --is waiting for them(they) They are waiting for a friend .改成一般将来时态 mine,I,am,for,good,of,waiting,a,friend What’s she waiting for? —She’s waiting for a friend of _____ A friend is unhappy because they think nobody likes them. So they say a cup of coffee is necessary for them in the mor food (is waiting/has waited) for them at the foot of the hil A friend of ours are waiting for us这句对吗,要不要把are 改成is?这句主语是A it is a special day for them because they they are --- a bus now A waiting for B waiting Each of them is a soldier,aren't they? 分析句子成分：He is a good teacher,and he is a good friend of them